Commit 563af186 authored Dec 21, 2012 by Joe Thornber Committed by Alasdair G Kergon Dec 21, 2012

dm thin: wake worker when discard is prepared



When discards are prepared it is best to directly wake the worker that
will process them.  The worker will be woken anyway, via periodic
commit, but there is no reason to not wake_worker here.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

parent e8088073

drivers/md/dm-thin.c

+7 −4

Original line number	Diff line number	Diff line
		@@ -2676,10 +2676,13 @@ static int thin_endio(struct dm_target *ti,
		if (h->all_io_entry) {
		INIT_LIST_HEAD(&work);
		dm_deferred_entry_dec(h->all_io_entry, &work);
		if (!list_empty(&work)) {
		spin_lock_irqsave(&pool->lock, flags);
		list_for_each_entry_safe(m, tmp, &work, list)
		list_add(&m->list, &pool->prepared_discards);
		spin_unlock_irqrestore(&pool->lock, flags);
		wake_worker(pool);
		}
		}

		mempool_free(h, pool->endio_hook_pool);